Missy’s dinner bill came to $19.50. If she leaves a 20% tip, what will be the total cost of Missy’s meal?

If a || b and b | y, then ? a) x || y. b) x | a. c) a | y. d) a || y.

If the value of cos330°is√3/2 then find cos 165°.

Find the volume of the solid obtained by rotating the region enclosed by the curves y=1x and y=7^-x about the x-axis. (use symbolic notation and fractions where needed.) volume =